There are over 6 million PAM units in the ground around the world utilizing technically advanced materials and engineering. Our focus on the needs of the end-user -- rather than developing products merely to meet a minimum performance standard -- led us to ductile iron, a superior alternative to cast iron in terms of weight, strength and designability. PAM manhole covers and gratings represent a quantum leap in ergonomics, safety, durability and overall product performance. Click on a photo below to view a product demo.